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Electrochemical induction of alkali-silica reaction in concrete

Sergi, G. / Page, C. L. / Thompson, D. M.

Abstract The use of cathodic protection as a method of countering chloride-induced corrosion of steel in concrete causes the formation of hydroxyl ions at the surface of the embedded metal. The preliminary experiments described in this note were aimed at evaluating a possible side-effect of this process under circumstances where the concrete contains a potentially reactive aggregate. For concrete specimens containing calcined flint aggregate, it was shown that deleterious local expansion of the material was generated owing to alkali-silica reaction induced in the vicinity of embedded steel when the latter was subjected to potentiostatic polarization for a period of several months at −850 mV (SCE scale). Continuing investigations are aimed at providing further insight into this phenomenon to aid the assessment of its practical implications.

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Electrochemical induction of alkali-silica reaction in concrete

Sergi, G. / Page, C. L. / Thompson, D. M.

Abstract The use of cathodic protection as a method of countering chloride-induced corrosion of steel in concrete causes the formation of hydroxyl ions at the surface of the embedded metal. The preliminary experiments described in this note were aimed at evaluating a possible side-effect of this process under circumstances where the concrete contains a potentially reactive aggregate. For concrete specimens containing calcined flint aggregate, it was shown that deleterious local expansion of the material was generated owing to alkali-silica reaction induced in the vicinity of embedded steel when the latter was subjected to potentiostatic polarization for a period of several months at −850 mV (SCE scale). Continuing investigations are aimed at providing further insight into this phenomenon to aid the assessment of its practical implications.

Electrochemical induction of alkali-silica reaction in concrete

Sergi, G. / Page, C. L. / Thompson, D. M.

Abstract The use of cathodic protection as a method of countering chloride-induced corrosion of steel in concrete causes the formation of hydroxyl ions at the surface of the embedded metal. The preliminary experiments described in this note were aimed at evaluating a possible side-effect of this process under circumstances where the concrete contains a potentially reactive aggregate. For concrete specimens containing calcined flint aggregate, it was shown that deleterious local expansion of the material was generated owing to alkali-silica reaction induced in the vicinity of embedded steel when the latter was subjected to potentiostatic polarization for a period of several months at −850 mV (SCE scale). Continuing investigations are aimed at providing further insight into this phenomenon to aid the assessment of its practical implications.

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Title:

Electrochemical induction of alkali-silica reaction in concrete

Contributors:

Sergi, G. (author) / Page, C. L. (author) / Thompson, D. M. (author)

Published in:

Materials and Structures ; 24

Publication date:

1991

ISSN:

DOI:

https://doi.org/10.1007/BF02472069

Type of media:

Article (Journal)

Type of material:

Print

Language:

English

Keywords:

Cathodic Protection , Reactive Aggregate , Potentiostatic Polarization , Flint , Cement Binder

Classification:

BKL: 56.45 Baustoffkunde / 51.30 Werkstoffprüfung, Werkstoffuntersuchung
Local classification TIB: 275/6500 / 250/6500

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